Boss WAZA Tube Amp Expander, Control Centre for Tube Amplifiers, Modern, variable reactive attenuator circuit for tube amplifiers up to 150 W, Impedance settings for properly adjusting the load resistance of the amplifier, Preserves the natural sound, the dynamic feel and the individual character of the distortion, 10 Memory slots, Versatile parameters controlled via GA-FC / FS foot pedals and MIDI, Integrated 100 W Class AB power amplifier with discrete analogue design and seamless volume control, Powerful DSP section, Customisable stereo effects: Compressor, Delay, Reverb and four EQs, 22 Speaker-box emulations with five selectable close mic and three surround microphone types plus four slots for uploading your own speaker impulse responses, External effect loop with selectable serial / parallel operation and control input for switching the amplifier channels, Parallel speaker output for connecting two speakers for live use, Balanced XLR line outputs (mono and L / R stereo) for connecting a FOH mixing console, stage monitors and recorders, Headphone output for quiet practice with fully turned up amplifier sounds, Editor software (Mac / Windows), USB for direct audio recording and communication with the editor software, Controls: Speaker Out, Line Out, Phones, Resonance Z, Presence Z, Rig, Reverb, Buttons: Fx Loop, Effects, Solo / EQ, Amp Ctl, Switches: Speaker Impedance, Input Level, L / R Gnd Lift, Mono (Foh) Gnd Lift, Loop, Level, Send Gnd Lift, Return Gnd Lift, Amp Ctl, LED: Power, Write, FX Loop, Effects, Solo / EQ, Amp Ctl, Input Sig / Peak, Footswitch: Dimensions (W x D x H): 381 x 297 x 111 mm, Weight: 6.8 kg@+*Connectors:*@+@+, From tube amplifier: 6.3 mm jack, Speaker Out A&B: 6.3 mm jack, Line out L/R: XLR, Line out mono: XLR, Headphones: 6.3 mm stereo jack, Send: 6.3 mm jack, Return: 6.3 mm jack, FX loop: 6.3 mm jack, GA-FC: 6.3 mm stereo jack, Amp Ctl: 6.3 mm jack, USB B port, MIDI: In, Thru / Out